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(NJModeL) R. J. QUIGLEY.

- WATCH CASE SPRING. No. 306.954. Patented Oct. 21, 1884. w

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'- strain is enabled to open said cover.

UNITED Srarns Parana Uterine.

ROBERT J. QUlGLll lY, OF TORONTO, ONTARIO, CANADA.

WATCH-CASE SPRING.

SPECIFICATION forming part of Letters Patent No. 306,954, dated October 21,1884.

Application filed'liarch 2-1, 188-1.

To aZZ whom it may concern.

Be it known that I, ROBERT J. QUIeLnr, of Toronto, in the county of York, and in the Province of Ontario, Canada, have invented certain new and useful Improvements in atch-Case Springs; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specfication, in which Figure 1. is a perspective view of an ordinary lifting-spring separated from its case. Fig. 2 is a like View of my lifting-spring. Fig. 3 is an axial section of a watch-case containing the spring shown in Fig. 1, and Fig. 4 is a like view of a case containing my improved lifting-spring.

Letters of like name and kind refer to like parts in each of the figures.

The object of my invention is to simplify the construction and action and to lessen the expense of lifting-springs for watclreases; to which end said invention consists, principal ly, in combining with the hinged cover of a watch-case a spring whose free end is inova ble only in a direction parallel to the plane of the ease-center, adapted to open the cover by pressure radial with reference to the case-center, substantially as hereinafter shown and de scribed.

It consists, further, in combining with the hinged cover of a watch-case a spring adapted to open the same by pressure direct, outward, and radial with reference to the case-center, substantially as hereinafter shown and described.

In cases as heretofore constructed the cover A is hinged to the center B, as shown in Fig. 3, and is opened by means of a spring, G, that is secured within the interior of said center, and provided with a reduced portion, 0, which has an upward and outward curving end, 0, that engage with the hinge-lug a at its point of attachment to said cover, and by a torsional The spring thus constructed is expensiye in con struction, easily broken, and from the fact that it acts upon the cover at a point so near to the pivotal bearing of the same its effect is to exert an injurious lifting strain upon said bearing, and not only materially increase the (X0 model.)

wear at such point, but also operate to lift said cover from its seat upon the center whenever said pivotal bearing becomes slightly orn, and thereby permit of the ready introduction of dust and dirt to the interior of the case.

In the carrying into effect of my invention a pin. 1), is placed within a case-center, E, in such position as to be parallel with the faces thereof, and at a right angle to the radius of the same, where it operates as a pivotal or hinge pin for connecting one or both of the coversor the bezel with said center. The front cover, F, is provided with a lug, f, which is,

secured to its inner face at a point just inside of the bearing-edgef, and from thence extends in a curve forward, downward, and outward, and terminates at a point slightly farther from the axial center of said part than is its said point of attachment thereto. The lug f is inserted through a corresponding opening, a, in the side of the case-center E, and has its outer end journaled upon the pin D, in which position it operates as a pivotal or hinge connection between the cover A and said case-center, and permits the former to be opened or closed in the usual manner. The convex side of said hinge-lugf has a convolute form and constitutes a cam, of which the smallest diameter is at the pivotal end, and its largest diameter at or near the point of attachment of said cover F.

Secured within the circumferential recess 0, formed in the interior of the case-center E, is a spring, G, which has its body conformed to the longitudinal and transverse shapes of said recess, and is held therein by means of a screw, H, that passes through a contiguous portion of said center, and has its threaded end contained within a correspondingly-threaded opening in said spring. The portion 9 of the spring G adjacent to the hinge of the cover F is reduced in thickness, as shown, and upon its outer side, at its end, is provided with a bearing, 9, that conforms to and rests upon the periphery of the hinge-lug f in front of and slightly above the pin D, and is arranged to exert a radiallyoutward pressure upon the same, which pressure, when said cover is liberated from the catch 1, causes the latter to automatically turn upward and outward to the usual position.

'lhe operation of the spring end 1/ upon the hinge-lugf is twofold, viz As such pressure is exerted at a point above the pivotal hearing of said lug, the el'l'eet is by direct pressure to cause the latter, with its cover 1", to turn upward and outwartfl, while in consequence of the convolute or earn shape of the periphery of said lug an outward pressure of said spring upon its inclined face produces the same ct?- feet by forcing the largest portion of said cant upward, and consetptently outward.

tion shown both of the causes named operate to produce the desired result, either will alone effect the desired result.

The spring t is easily and cheaply eonstrueted, and as it operates in a direct line and its rangeol motion is comparatively small i It will therefore he seen that while in the construc- 2 little liability for breakage exists in compari- I. in, combination with the hinged cover ot a watch-ease a spring; whose free end is Il'lOV- able only in a direction parallel to the plane of the ease-eenter, adapted to open the cover by nressure radial with reference to the east center substantially as shown and described.

3. in eoinbinziition with the hinged cover of a watclrease, a spring adapted to open the same by pressure direct, outward, and radial with reference to the case-eenter, substantially as shown and described.

33. In continuation with the hinged cover 01: a watch-ease, a spring which is located within the watelirease center, and :n'ranged to exert an cmtward pressure upon the pivotal or hinge lug between its pivotal hearing and the pointof its attachment to said cover, suhstantially as and for the purpose shown.

it. In combination with a earn-shaped hinge lug which ia-z'rttaehed to and forms a pivotal connection between the cover and center of a watch-ease, a spring that, by a radial]y-outward pressure upon the periphery of said lug, operates to open said (cover, substantially as and for the mrpose set forth.

In testimony that I claim. the foregoing .l have hereunto set my hand this th day of March, A. fl). 1558:].

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